KR101418891B1 - Method for producing a liquid electrolyte battery - Google Patents

Abstract

The present invention relates to a method of manufacturing a liquid electrolyte battery which is preferably used in a mobile device such as a vehicle, a vessel or an airplane. The method according to the invention comprises the following steps: inserting one mixing plate (5a) into the battery box (1) at two opposite sides of the battery box, inserting two mixing plates (5a (2b) of the horizontal mixing bridge plate (5b '), the horizontal mixing bridge plate (5b') being connected to the horizontal mixing bridge plate A coupling step with an electrolytic through recess at approximately the center and a slightly inclined downward sloping surface for the electrolyte.

Battery box, mix plate, electrode plate packet, mixed bridge plate, recess, slope.

Description

METHOD FOR PRODUCING A LIQUID ELECTROLYTE BATTERY Technical Field [1] The present invention relates to a method of manufacturing a liquid electrolyte battery,

The present invention relates to a method of manufacturing a liquid electrolyte battery which is preferably used in a mobile device such as a vehicle, a vessel or an airplane.

Efforts to lighten automobiles in the automotive industry include reducing the weight of the battery. At the same time, however, the demand for larger battery power also increases because of the conventional energy for starting the vehicle, as well as the power window lifter, the addition of a servomotor for conditioning the seat or for electrically heating the seat This is because energy for equipment is also needed. Also, it is desirable that the battery output is maintained at a constantly high level as much as possible over the life of the battery.

Prior art discloses various measures for increasing the output of a conventional lead-acid battery. The output means the current supply power or the current consumption power of the battery below.

A particular problem with lead-acid batteries is the possible full use of electrode surfaces. If the acid concentration in the region of the electrode surface is too high, it corrodes the electrode plate and eventually destroys the electrode plate. If the acid concentration is too low, electrolyte characteristics required for reliable operation of the battery are insufficient. Due to the various effects known in the prior art, the acid density within the battery is non-uniform. In order to eliminate this disadvantage, an electrolyte mixing device has been developed.

This also prevents the formation of deposits that adversely affect the function and lifetime of the battery.

Publication DE 19114909 discloses an accumulator battery in which electrolyte circulation is forced by introduction of gas from a compressed gas source. This circulation method is only suitable for vehicle batteries due to the complicated configuration of the circulation device, in particular a further compressed gas source is required. The prior art also discloses an electrolyte mixing device, which is also referred to as a hydrostatic pump, and its function is described below: If the vehicle moves at the same speed, i. E. Not braked or accelerated, The surface of the liquid electrolyte in the used battery is flat and horizontal. During the braking or accelerating process, the electrolyte swings back and forth due to inertia. The resulting electrolyte flow is controlled such that good mixing is achieved by the barrier and the channel.

Such principles are described in particular in US 4,963,444; US 5,096,787; US 5,032,476 and the closest prior art German utility model DE 297 18 004.5. The object of the closest prior art is an angled mixing device disposed between the electrodes in the battery box, as shown in Fig.

In making up to now a conventional battery without a mixing device or a battery with a mixing device, the electrode plate packet 2 is first inserted into an empty battery box. If a battery with a mixing device is to be constructed, the electrode plate packet must be precisely centered within the battery box, so that the gap between the vertical edge of the electrode plate packet and the battery box wall must be the same width on both sides. However, this is difficult to ensure because the use of robots and similar handling techniques are so expensive that the insertion of heavy electrode plate packets is done manually.

The electrode plates are surrounded by a plastic film (hereinafter referred to as an electrode pocket). The electrode pockets are mechanically very sensitive. Subsequent insertion of angled blades into the respective gaps on the left and right sides should be done very carefully to prevent damage to the electrode pouch. Damaged electrode pockets cause premature failure of the associated battery cells, thereby causing a reduction in the output of the battery.

In the case shown in FIG. 2, the gap between the vertical edge of the electrode plate packet and the battery box wall on the left side is narrower than on the right, since the electrode plate packet is disposed too far to the left in the battery box.

The conventional manufacturing method has another disadvantage shown schematically in Fig. The flow channel formed between the battery wall and the vertical leg of the mixing plate on the left side is narrower than the flow channel on the right side unless the electrode plate packet is placed in a structurally provided position as shown in Fig. However, since the flow channels are optimized in their width, variation in width reduces the efficiency of mixing. In the case shown in Figure 3B, the flow channels have the same width on both sides, so good mixing is achieved as shown by the flow arrows.

A particular disadvantage of this manufacturing technique is that damage to the electrode pouch can not be detected during the final control of the battery. Therefore, damage to the electrode pouch should be prevented unconditionally. At the same time, the cost of this assembly step should not increase. That is, a simple and reliable solution must be found. Accordingly, an object of the present invention is to eliminate the disadvantages of the prior art. In particular, damage to the electrode pouch should be prevented.

The above problem is solved by a method for manufacturing a liquid electrolyte battery having the mixing device according to claim 1.

The method according to the invention comprises the following steps:

- manually inserting one mixing plate into two opposing walls of the battery box; The mixing plates are slightly inclined, i.e. the mixing angle member used in the prior art is divided into a vertical part and a horizontal part in this method. The vertical portion is hereinafter referred to as a mixed plate. The blend plates are slightly inclined in the battery box. That is, it has a slope of about 10 to 25 degrees depending on the configuration of the battery.

Inserting an electrode plate packet between two mixing plates disposed in the battery box; The blending plates are pushed into a vertical position, i.e., when the electrode plate packets are manually inserted into the battery box, the blending plates are pushed into a given vertical position. Since the mix plates are light and smooth, there is no risk of damage to the electrode pouch during this process. Also, the electrode plate packet is pushed to the correct position during manual insertion by the mixing plate used as the centering assistant means.

- mounting the mixing bridge plate horizontally on the two vertically placed mixing plates.

Advantages to be described later are obtained by the above technical steps in battery manufacturing.

First, since the vertical mixing plates of the divided mixing devices are inserted into the battery box, and the electrode plate packet is inserted between the mixing plates, the damage of the sensitive side edge of the electrode plate is prevented. In this case, automatic centering is performed. The automatic centering can be further improved if the battery box is placed on a roller conveyor.

Further, in the manufacturing method according to the present invention, the electrode plates are disposed at precisely predetermined positions in the battery box by the mixed plates inserted into both sides. This has the further advantage that the electrical terminals of each electrode plate are precisely located at a predetermined spatial location. Subsequently, the terminals are welded to each other by the welding robot, whereby the individual battery cells are connected in series. Until now, the terminals have to be relatively wide so that they can be welded together even if the electrode plates are not optimally positioned with respect to each other. According to the present invention, since the electrode plates are accurately arranged with respect to each other, and therefore the large tolerance does not need to be compensated, accurate welding of the terminals is possible while enabling reduction of the terminals. With smaller terminals, more than about 200 grams of lead per battery can be saved.

After insertion of the mixing plate and the electrode plate packet, the mixing bridge plate is placed on the mixing plates arranged vertically and connected at right angles thereto, so that a compact mixing device is formed. When the mixing bridge plate is placed on the vertically arranged mixing plates, the mixing bridge plate contributes to reinforce the entire battery box by spreading the deformation of the battery box formed during the injection molding. Another advantage compared to the prior art is that the upper surface of the mixing bridge plate, which is used as the electrolyte slope, has a predetermined slope from both end faces toward the center, and the inclination is longer when assembling the mixing bridge plate and when mounting the battery box cover It is unchanged and almost independent of the manufacturing tolerances of the battery box, so that an optimum mixing action is obtained. The manufacturing method according to the present invention will be described in detail with reference to the drawings.

1 is a side view of a lead-acid battery having a mixing angle member according to the prior art;

2 (2a-2c) show the manufacturing steps of the manufacturing method according to the prior art.

3 (3a) and (3b) compare the functions of the prior art and the present invention.

4 (4a-4d) are assembly steps according to the invention.

5 (5a, 5b) is a perspective view of the mixing bridge.

The present invention will be described with reference to Figures 4 and 5, and Figures 1 to 3, which illustrate the prior art, are also contemplated.

Fig. 1 shows a battery box 1 having a lead electrode plate 2 and an acid charging part 3. Fig. In the mechanical rest state, the level of the acid live part is indicated by 4. 5a and 5b show the vertical or horizontal legs of the angled mixing device. When the battery is inserted into the vehicle, for example, and the vehicle moves in the direction indicated by the arrow A, the mountain between the vertical leg 5a and the box wall during the braking process is moved upward and flows over the horizontal legs 5b. This regularly occurring process causes a certain acid mixture. The mixing apparatus is shown only on one side of the battery box 1 in Fig.

2 shows related method steps for manufacturing such a conventional battery. The lead electrode plate packet 2 is first inserted into the empty battery box 1. The lead electrode plate packet 2 is not completely centered, as shown in FIG. 2B. In the following method steps, the mixing angle members 5a, 5b are inserted on both sides. The plastic casing of the lead electrode plate packet 2 on the left side may be damaged because the lead electrode plate packet 2 is close to the wall of the battery box 1 as shown in Fig. . Damage to the plastic casing of the electrode plate causes premature failure of the cell, thus causing failure of the entire battery.

Figure 3 shows another disadvantage of the conventional manufacturing method: if the electrode plate packet is not in a structurally given position, as shown in Figure 3A, two battery walls and two The flow channels have different widths. However, since the flow channels are optimized in their width, variation in width reduces the efficiency of mixing. Since the flow channels on both sides in Figure 3B have the same width, good mixing indicated by the arrows is achieved.

The method according to the present invention will be described with reference to Fig. A new mixing device consisting of three parts, namely two mixing plates 5a 'and one mixing bridge plate 5b', is used. First, the mixing plates 5a 'are inserted into the battery box 1 slightly inclined (Fig. 4B), and then the electrode plate packet 2 is inserted (Fig. 4C). By this measure, the electrode plate packet 2 is arranged exactly in the center of the battery box 1. [ In the final step according to the invention, shown in Figure 4d, the mixing bridge plates are placed on the mixing plates arranged vertically and joined at right angles to them.

5A and 5B are perspective views showing a mixing device composed of two mixing plates 5a 'and a mixing bridge plate 5b'. 5A is an exploded view of the mixing device, and FIG. 5B shows an assembled state of the mixing device. The method according to the invention is also suitable for the manufacture of liquid electrolyte batteries comprising a mixing device of a type different from that described above, for example a freight car battery.

Claims (3)

A manufacturing method of a lead-acid battery having a mixing device, - inserting the mixing plate (5a) slightly inclined into the battery box (1) at two opposite sides of the battery box (1) - inserting an electrode plate packet (2) between two mixing plates (5a ') in said battery box (1), said mixing plates being moved to a vertical position, The battery box (1) and the electrode plate packet (2) so that flow channels having a predetermined cross-sectional shape can be formed at predetermined positions in the battery box. And the mixing plate (5a ') are determined in accordance with the geometric dimension of the electrode plate packet (2) - an engaging step of vertically aligning said two mixing plates at right angles to a horizontal mixing bridge plate (5b '), said horizontal mixing bridge plate (5b') having an electrolyte passage recess Wherein the battery has an inclined surface for an electrolyte, slightly inclined downward. 2. The method of claim 1, wherein the mixing bridge plate (5b ') is inserted or clamped on the vertically disposed mixing plates (5a'). The method of claim 1, wherein the battery box is placed on a roller conveyor when inserting the electrode plate packet (2).

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